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Hi all,

I'm working in the wave optics->EM waves, beam envelope module, in 3D.

Attached is the geometry of the model I'm trying to use. It's based on 2 of the comsol models available - directional coupler and mach zehder interferometer.

I have an issue with either meshing or solving that I can't seen to find the source for, and I'd really appreciate any guidance or direction in the matter. Thanks in advance.

I've tried 3 different directions, non of which worked,

1. creating a mesh of "Free Triangular" over port 1&2, and sweeping it, using the swept option, over the rest of the geometry. In which case I encounter the error message "Unsupported topology of linking faces". I don't really understand what that means or how to solve the issue.

2. creating a mesh over the entire geometry using the "Free Tetrahedral" option. In this case I am able to create the mesh, but the file becomes stupendously large, and solving it becomes impossible. Trying to compute it I never succeed and receive various errors regarding memory, for instance "Out of memory during assembly" as well as others.

3. creating a mesh over the upper edge of port 1&2, mapping it over the upper boundary of the geometry (which was successful up to this point), but when I tried to sweep it over the rest of the geometry, again I encountered an error similar to the failure of #1.

I'd really appreciate any assistance in the matter. thanks in advance,

Tom.